Apparatus for manufacturing zinc white



March 18, 1930. J. M. H. CORNILLAT APPARATUS FOR MANUFACTURING ZINC WHITE Filed July 9, 1927 2 Sheets-Sheet l INVENTUR --JM,HCo/'niZZa- March 1930- J. M. H. CORNILLAT APPARATUS FOR MANUFACTURING ZINC WHITE Filed July 9, 1927 2 Sheets-Sheet 2 fv Mb NZ w Wm M m 1 Patented Mar. 18, 1930 JOSEPH MABCE L HENRI CORNILLAT, F PARIS,

APPARATUS FOR MANUFACTURING ZINC WHITE Application filed July 9, 1927, Serial No. 294,604, and in France July 15, 1926. i

The object of my invention is to providean improved apparatus for manufacturmg ZlIlC wh te in an economical manner, such apparatus involving a furnace body having rassociated with it means for projecting a fuel-oil flame against the zinciferous material and also having means for continuously stirring the material.

In the accompanying drawing, Figure 1 is a plan View of the improved apparatus with the hood omitted, Fig. 2 is a side. elevationof the furnace body and the chimney and other parts connected therewith, and Fig. 3 is a vertical section on line 3-3, Fig. 2.

Referring more particularly to the drawing, the furnace 19, which is here shown as cylindrical, is supported on rollers 13 to rock about its horizontal axis, and is provided internally with a suitable lining of refractory material, the furnace itself being made of metal. It is provided at one end wall 18 with a charging door. 2 through which the zinciferous material, indicated at 1, is introduced, while its opposite end wall is provided with two separate apertures?) and 4, the former to receive the mouth of a burner 8 which delivers into the furnace the flames and other products of combustion, and the latter to discharge the combustion products after they have acted on the material 1.

The outlet or discharge opening 4 leads by way of an exhaust ipe 10, into a-chimney 5 constructed of re ract'ory material, and wherein takes place the oxidation of the zinc vapors carried off with the combustion gases;

the chimney communicating with acondensing chamber (not shown) by means of a pipe 6.

The burner 8 mentioned'above is. fixed upon the upper surface of pipe 10 and is supplied with liquid fuel from a suitable tank y a pipe 7, and with air under pressure by a pipe 7 9 (both pipes being, preference, hose sections) from a fan 11; ,the aperture 3 bein inclined and having the burner mouth tig tly fitted to it so that the flames and hot gases produced by the combustible mixture of atomized fuel and air supplied by the burner are 6 caused to follow the extended path indicated by the arrows in Fig. 2. Diito this arrangecharging or cleaning,

ment, the flames and gases are compelled to remain within the furnace for a maximum period of time, thereby fostering more thorough combustion, during the course of which they first heat to incandescence the-refractory lining and then liquefy the material 1, carrying away with them through the aperture 4 the zinc vapors arising from the molten zinc. The air supplied by the hose pipe 9 reaches the burner in a heated state because :of its passage through an annular space or chamber 90 provided internally in the exhaust pipe 10, as shown in Fig. 3, between the outside shell or casing of said pipeand the refractory lining providing the outlet 4; said pipeflincluding a section 9 which leads to the urner from the chamber. The said chamber has an internal partition 21 to prevent the air entering through pipe 9 from reaching the outlet section 9 until it has circulated entirely through the chamber, which latter itself is heated by the gases passing through outlet 4 on their way to the chimney. Thedesired to-and-fro rocking movement of the' furnace body is effected by suitable mechanism which may, as shown, comprise a shaft 12 driven in any convenient manner and carrying on one end a flywheel 15 connected by a rod or pitman 16 to a stud 17 fixed to the end wall 18 of the furnace.- As will be so understood, this rocking movement will effectively prevent the formation of a crust on ,the molten zinc and, at the same time, will provide an increased surface contact between the zinc and the incandescent lining of the furnace.

Inorder to avoid loss of zinc vapors during when door 2 is open, a hood 14 may be arranged directly over said door and connected to the chimney 5.

I claini as mv invention: 7

Apparatus for manufacturing zinc white, comprising a furnace; a refractory lining in the furnace,-said furnace having a char ing door to admit zinciferous material therelnto, and also having at one end a burner inlet and below the same a gas outlet; a burner having its mouth disposed in said inlet and inclined downward toward the opposite end of the furnace to cause the flames and gaseous prodnets of combustion to travel in an extended path first toward the latter end and then back to the gas outlet; a pipe connected to the gas outlet end/of the furnace and leading from said outlet, through which pipe the combustion gases are exhausted from the furnace together With the vapors given ofi by the molten zinc; an annular chamber of limited capacity surrounding the gas exhaust pipe at a point external to the furnace; means for supplying air under pressure to the burner, said means including a pipe having a connection .with said chamber to effect preheating of the air by the hot gases passing through the exhaust pipe; and means separate from the lastnamed supply means for supplying liquid fuel to the burner for admixture with the preheated air.

In testimony whereof I aflix my signature.

JOSEPH MARCEL HENRI CORNILLAT. 

